26 July, 2026
04 July, 2026
Node.js Tutorial
Programing Coderfunda
July 04, 2026
Nodejs
No comments
Node.js Tutorial
Node.js is a powerful JavaScript runtime environment, built on Google Chrome's V8 JavaScript Engine. Node.js is open-source and cross platform.
What is Node.js?
Node.js is not a programming language like Python, Java or C/C++. Node.js is a runtime, similar to Java virtual machine, that converts JavaScript code into machine code. It is , widely used by thousands of developers around the world to develop I/O intensive web applications like video streaming sites, single-page applications, and other web applications.
With Node.js, it is possible to use JavaScript as a backend. With JavaScript already being a popular choice for frontend development, application development around MERN (MongoDB, Express, React and Node.js.) and MEAN (MongoDB, Express, Angular and Node.js) stacks is being increasingly employed by developers.
Why Learn Node.js?
Node.js can be used to full fill multiple purpose like server-side programming, build APIs, etc.
- Node.js is used for server-side programming with JavaScript. Hence, you can use a single programming language (JavaScript) for both front-end and back-end development.
- Node.js implements asynchronous execution of tasks in a single thread with async and await technique. This makes Node.js application significantly faster than multi-threaded applications.
- Node.js is being used to build command line applications, web applications, real-time chat applications, REST APIs etc.
How to Install Node.js?
Different operating systems required different steps to install Node.js, please follow the provided methods according to your installed operating system.
Applications of Node.js
Node.js is used for building different type of applications. Some of the application types are listed below.
- Streaming applications: Node.js can easily handle real-time data streams, where it is required to download resources on-demand without overloading the server or the users local machine. Node.js can also provide quick data synchronization between the server and the client, which improves user experience by minimizing delays using the Node.js event loop.
- Single page apps: Node.js is an excellent choice for SPAs because of its capability to efficiently handle asynchronous calls and heavy input/output(I/O) workloads. Data driven SPAs built with Express.js are fast, efficient and robust.
- Realtime applications: Node.js is ideal for building lightweight real-time applications, like messaging apps interfaces, chatbot etc. Node.js has an event- based architecture, as a result has an excellent WebSocket support. It facilitates real-time two-way communication between the server and the client.
- APIs: At the heart of Node.js is JavaScript. Hence, it becomes handling JSON data is easier. You can therefore build REST based APIs with Node.js.
These are some of the use cases of Node.js. However, its usage is not restricted to these types. Companies are increasingly employing Node.js for variety of applications.
Example of Node.js Application
To create a basic Hello World application in Node.js, save the following single line JavaScript as hello.js file.
console.log("Hello World");
Open a powershell (or command prompt) terminal in the folder in which hello.js file is present, and enter the following command. The "Hello World" message is displayed in the terminal.
PS D:\nodejs> node hello.js Hello World
To create a "Hello, World!" web application using Node.js, save the following code as hello.js:
http = require('node:http'); listener = function (request, response) { // Send the HTTP header // HTTP Status: 200 : OK // Content Type: text/html response.writeHead(200, {'Content-Type': 'text/html'}); // Send the response body as "Hello World" response.end('<h2 style="text-align: center;">Hello World</h2>'); }; server = http.createServer(listener); server.listen(3000); // Console will print the message console.log('Server running at http://127.0.0.1:3000/');
Run the above script from command line.
C:\nodejs> node hello.js Server running at http://127.0.0.1:3000/
The program starts the Node.js server on the localhost, and goes in the listen mode at port 3000. Now open a browser, and enter http://127.0.0.1:3000/ as the URL. The browser displays the Hello World message as desired.
Prerequisites to Learn Node.js
Before proceeding with this tutorial, you should have a basic understanding of JavaScript. As we are going to develop web-based applications using Node.js, it will be good if you have some understanding of other web technologies such as HTML, CSS, AJAX, etc.
Getting Started with Node.js
This tutorial is designed for software programmers who want to learn the Node.js and its architectural concepts from basics to advanced. This tutorial will give you enough understanding on all the necessary components of Node.js with suitable examples.
Basics of Node.js
Before going deep into nodejs you should familiar with fundamentals of nodejs like environment setup, REPL terminal, NPM, Callbacks, Events, Objects, etc.
Node.js Modules
Node.js modules provides a collection of functions that are used to perform different operations as per the requirements. All the important modules are listed below.
Node.js Jobs and Salary
Node.js. is a popular tool for almost any kind of project. After Learning Node.js you can get job on different job profiles.
- Node.js Developer - Salary ranges in between 1.2 Lakhs to 12.6 Lakhs with an average annual salary of 5.7 Lakhs.
- Node.js Backend Developer - Salary ranges in between 1.2 Lakhs to 11.0 Lakhs with an average annual salary of 4.7 Lakhs.
07 July, 2025
Sitaare Zameen Par Full Movie Review
Programing Coderfunda
July 07, 2025
Movie
No comments
Here’s a complete Vue.js tutorial for beginners to master level, structured in a progressive and simple way. It covers all essential topics step-by-step, with explanations and code samples.
🌟 Vue.js Tutorial — Beginner to Master (2025)
🔰 Section 1: Introduction to Vue.js
What is Vue.js?
Vue.js is a progressive JavaScript framework used to build interactive web interfaces.
Lightweight and easy to integrate.
Can be used for both single-page applications (SPA) and component-based apps.
Why Vue.js?
Simple and approachable.
Flexible: supports both CDN and CLI.
Excellent documentation.
Strong community support.
Step-by-step Vue.js Tutorial Beginner to Master
Programing Coderfunda
July 07, 2025
Vue.js Tutorial
No comments
Here’s a complete Vue.js tutorial for beginners to master level, structured in a progressive and simple way. It covers all essential topics step-by-step, with explanations and code samples.
🌟 Vue.js Tutorial — Beginner to Master (2025)
🔰 Section 1: Introduction to Vue.js
What is Vue.js?
-
Vue.js is a progressive JavaScript framework used to build interactive web interfaces.
-
Lightweight and easy to integrate.
-
Can be used for both single-page applications (SPA) and component-based apps.
Why Vue.js?
-
Simple and approachable.
-
Flexible: supports both CDN and CLI.
-
Excellent documentation.
-
Strong community support.
📦 Section 2: Getting Started
✅ Using Vue via CDN (Beginner Friendly)
<!DOCTYPE html>
<html>
<head>
<title>Vue CDN Example</title>
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
</head>
<body>
<div id="app">
<h1>{{ message }}</h1>
</div>
<script>
new Vue({
el: '#app',
data: {
message: 'Hello Vue!'
}
});
</script>
</body>
</html>
✅ Using Vue CLI (Recommended for Projects)
npm install -g @vue/cli
vue create my-app
cd my-app
npm run serve
⚙️ Section 3: Core Concepts
📌 Vue Instance
new Vue({
el: '#app',
data: {
message: 'Welcome!'
}
});
📌 Data Binding
<p>{{ message }}</p>
📌 Directives
-
v-if,v-else,v-show -
v-for,v-bind,v-model,v-on
Example:
<input v-model="name">
<p>Hello, {{ name }}</p>
🧠 Section 4: Vue Events
📌 Event Handling
<button v-on:click="sayHello">Click Me</button>
<script>
new Vue({
el: '#app',
methods: {
sayHello() {
alert('Hello!');
}
}
});
</script>
📌 Event Modifiers
-
.stop,.prevent,.capture,.once
Example:
<form v-on:submit.prevent="submitForm">...</form>
📋 Section 5: Computed & Watchers
✅ Computed Properties
computed: {
reversedMessage() {
return this.message.split('').reverse().join('');
}
}
✅ Watchers
watch: {
message(newVal, oldVal) {
console.log('Changed from', oldVal, 'to', newVal);
}
}
🧩 Section 6: Vue Components
✅ Global Component
Vue.component('my-component', {
template: '<div>This is a component!</div>'
});
✅ Local Component
components: {
MyComponent
}
📁 Section 7: Vue CLI Project Structure
my-app/
├── node_modules/
├── public/
├── src/
│ ├── assets/
│ ├── components/
│ ├── App.vue
│ ├── main.js
🛠️ Section 8: Vue Router
✅ Installation
npm install vue-router
✅ Basic Setup
import VueRouter from 'vue-router';
const routes = [
{ path: '/home', component: Home },
{ path: '/about', component: About }
];
const router = new VueRouter({ routes });
new Vue({
router
}).$mount('#app');
🔄 Section 9: Vuex (State Management)
✅ Installation
npm install vuex
✅ Basic Store Setup
const store = new Vuex.Store({
state: {
count: 0
},
mutations: {
increment(state) {
state.count++;
}
}
});
🌐 Section 10: API Calls with Axios
✅ Installation
npm install axios
✅ Usage
created() {
axios.get('https://api.example.com/data')
.then(response => {
this.items = response.data;
});
}
🎨 Section 11: Styling and Transitions
✅ Dynamic Classes
<div :class="{ active: isActive }"></div>
✅ Transitions
<transition name="fade">
<p v-if="show">Hello</p>
</transition>
🚀 Section 12: Deployment
✅ Build for Production
npm run build
-
Deploy
dist/folder to Netlify, Vercel, Firebase, or your own server.
🏆 Section 13: Best Practices
-
Use components for reusability.
-
Keep logic in
methods,computed, andwatchers. -
Use Vue DevTools for debugging.
-
Keep state management centralized with Vuex (or Pinia in Vue 3).
-
Separate concerns: templates, script, styles in
.vuefiles.
📚 Section 14: Learning Resources
-
YouTube Channels: Traversy Media, Academind
✅ Conclusion
With this step-by-step Vue.js guide, you're ready to:
-
Build single-page apps
-
Create dynamic components
-
Handle API integrations
-
Manage state with Vuex
-
Deploy like a pro
Would you like a PDF version or a sample Vue CLI project template to get started faster?
01 July, 2025
Tailwindcss best practices for responsive design
Programing Coderfunda
July 01, 2025
Tailwind-Css
No comments
Tailwind CSS provides powerful utilities for responsive design out of the box. To use it effectively and maintain clean, scalable code, here are best practices for responsive design in Tailwind CSS:
✅ 1. Mobile-First Approach
Tailwind uses a mobile-first breakpoint system. That means:
-
Base styles apply to all screen sizes.
-
Use responsive prefixes (like
sm:,md:, etc.) to override styles at larger breakpoints.
<div class="text-base md:text-lg lg:text-xl">Responsive Text</div>
✅ 2. Use Tailwind's Breakpoints Strategically
Tailwind’s default breakpoints are:
sm: 640px
md: 768px
lg: 1024px
xl: 1280px
2xl: 1536px
You don’t have to use all of them. Apply breakpoints only where design truly changes to avoid clutter.
✅ 3. Consolidate Classes with Responsive Variants
Avoid repeating the same base styles for each breakpoint. Stack only what’s needed.
<!-- Bad -->
<div class="text-sm sm:text-sm md:text-base lg:text-lg xl:text-xl">
<!-- Good -->
<div class="text-sm md:text-base lg:text-lg xl:text-xl">
✅ 4. Use Flex/Grid Utilities for Layout
Take advantage of Tailwind's flex, grid, and gap utilities for layout instead of writing custom CSS.
<div class="grid grid-cols-1 md:grid-cols-2 gap-4">
✅ 5. Use Utility Components for Reusability
Create reusable components using @apply in your CSS or extract components in your framework (React, Vue, etc.).
/* styles.css */
.btn {
@apply px-4 py-2 bg-blue-500 text-white rounded hover:bg-blue-600;
}
✅ 6. Avoid Overusing Inline Responsive Classes
When components become complex, consider extracting styles to classes with @apply, or move to JSX/component-based logic.
<!-- Instead of -->
<div class="p-2 sm:p-4 md:p-6 lg:p-8 xl:p-10">...</div>
<!-- Use a component with logic or a utility class -->
<div class="responsive-padding">...</div>
✅ 7. Use container with max-w-* for Centered Layouts
The container class + mx-auto + max-w-* gives you responsive content width and alignment.
<div class="container mx-auto px-4 max-w-7xl">
✅ 8. Test on Real Devices or Emulators
Don’t rely solely on browser resizing. Use Chrome DevTools or tools like Responsively App to test your layout on real device resolutions.
✅ 9. Use Plugins for Custom Breakpoints if Needed
If your project has custom design specs, you can extend Tailwind's default breakpoints in tailwind.config.js.
theme: {
extend: {
screens: {
'xs': '480px',
'3xl': '1600px',
}
}
}
✅ 10. Use Logical Class Ordering
Organize your class names logically for readability:
Layout → Box Model → Typography → Visuals → Responsive
Example:
<div class="flex items-center justify-between p-4 bg-gray-100 text-sm md:text-base">
Would you like a responsive layout example or cheat sheet with common patterns (navbars, grids, etc.)?
Tailwind CSS Tutorial (Beginner to Master)
Programing Coderfunda
July 01, 2025
Tailwind-Css
No comments
Here's a simple and complete Tailwind CSS tutorial designed for students and beginners, progressing step-by-step from beginner to master level. This guide is easy to follow, practical, and helps build real-world UI skills.
🎯 Tailwind CSS Tutorial (Beginner to Master)
Simple & Best Way for Students
✅ 1. What is Tailwind CSS?
Tailwind CSS is a utility-first CSS framework for building custom designs without writing traditional CSS. You use pre-built classes like
bg-blue-500,text-center,p-4, etc.
✅ 2. Why Use Tailwind CSS?
-
No need to write custom CSS
-
Faster development
-
Fully responsive
-
Easily customizable
-
Works with all frontend frameworks (HTML, React, Vue, etc.)
✅ 3. How to Install Tailwind CSS (2 Easy Ways)
🔹 Option 1: Use CDN (For Beginners)
Paste this in your HTML file <head>:
<link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
✅ Good for practice
❌ Not recommended for production
🔹 Option 2: Install with NPM (Professional Setup)
npm init -y
npm install -D tailwindcss
npx tailwindcss init
Create tailwind.config.js and setup input.css:
/* input.css */
@tailwind base;
@tailwind components;
@tailwind utilities;
Build CSS:
npx tailwindcss -i ./input.css -o ./output.css --watch
Then link output.css in HTML.
✅ 4. Tailwind CSS Structure (Basics)
<div class="p-4 bg-blue-500 text-white text-center rounded-lg">
Hello Tailwind!
</div>
🔹 Common Utilities:
| Utility | Example | Meaning |
|---|---|---|
| Padding | p-4 |
padding: 1rem |
| Background | bg-red-500 |
red background |
| Text color | text-white |
white text |
| Text align | text-center |
center text |
| Rounded corner | rounded-lg |
border-radius |
✅ 5. Responsive Design
Tailwind is mobile-first. Use breakpoints:
<div class="text-sm md:text-lg lg:text-xl">Responsive text</div>
✅ 6. Layout with Flex & Grid
🔹 Flexbox:
<div class="flex justify-between items-center">
<span>Left</span>
<span>Right</span>
</div>
🔹 Grid:
<div class="grid grid-cols-2 gap-4">
<div>Box 1</div>
<div>Box 2</div>
</div>
✅ 7. Components Examples
🔹 Button
<button class="px-4 py-2 bg-green-500 text-white rounded hover:bg-green-600">
Click Me
</button>
🔹 Card
<div class="max-w-sm rounded overflow-hidden shadow-lg p-4 bg-white">
<h2 class="text-xl font-bold mb-2">Card Title</h2>
<p class="text-gray-700">This is a card description.</p>
</div>
✅ 8. Master Level Tips
🔹 Use @apply to create reusable classes:
/* styles.css */
.btn {
@apply px-4 py-2 bg-blue-600 text-white rounded hover:bg-blue-700;
}
🔹 Customize tailwind.config.js
theme: {
extend: {
colors: {
brand: '#1e40af',
}
}
}
✅ 9. Project Ideas for Practice
| Project | Skills Practiced |
|---|---|
| Portfolio Site | Layout, responsive design |
| Login Form | Form styling |
| Blog Layout | Grid, typography |
| E-commerce UI | Cards, buttons, filters |
✅ 10. Resources for Learning
-
📺 YouTube Channels: Traversy Media, The Net Ninja, Code with Harry
-
💡 Use Tailwind Play to experiment online
✅ Summary: Learning Path
| Level | Learn |
|---|---|
| Beginner | Basic classes, text, padding, layout |
| Intermediate | Responsive design, components |
| Advanced | Custom config, @apply, themes |
Would you like a starter template, or I can create a full project with Tailwind (like a portfolio or ecommerce landing page)?
20 September, 2024
Failed to install 'cordova-plugin-firebase': CordovaError: Uh oh
Programing Coderfunda
September 20, 2024
No comments
pyspark XPath Query Returns Lists Omitting Missing Values Instead of Including None
Programing Coderfunda
September 20, 2024
No comments
Here is the sample data and code I'm working with:
data = [
(1, """
Lion
Apple
Banana
Tiger
Cranberry
"""),
(2, """
Lion
Apple
Tiger
Banana
Zebra
""")
df = spark.createDataFrame(data, ["id", "xml_string"])
What the XPath queries return:
For data column:
(1, ["Apple","Banana","Cranberry"], ["Lion","Tiger"])
(2, ["Apple","Banana"], ["Lion","Tiger","Zebra"])
What I want:
For data column:
(1, ["Apple","Banana","Cranberry"], ["Lion", None, "Tiger"])
(2, ["Apple","Banana", None], ["Lion","Tiger","Zebra"])
How can I adjust my XPath queries?
root/level1/level2/level3/level4/data
root/level1/level2/level3/data2
SQL REPL from within Python/Sqlalchemy/Psychopg2
Programing Coderfunda
September 20, 2024
No comments
Is there any convenience method like engine.interactive() that just drops you into a CLI in the current database, similar to breakpoint() dropping you into a PDB? One thing I considered was
subprocess.run(['psql', engine.url])
But that doesn't work since psql doesn't accept the +psycopg2: bit of the sqlalchemy connection string.
$ psql postgresql+psycopg2://postgres:dev@localhost:5432/
psql: error: connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: FATAL: role "root" does not exist
$ psql postgresql://postgres:dev@localhost:5432/
psql (16.4 (Debian 16.4-1.pgdg120+1))
Type "help" for help.
postgres=#
I can slice it off myself and this works:
def enter_cli(engine):
url = engine.url.set(drivername=url.drivername.split("+")[0])
connection_string = url.render_as_string(hide_password=False)
subprocess.run(["psql", connection_string])
But that seems likely to be non-portable, as I'm hardcoding the CLI and the specific type of connection string. (e.g. it looks like pgcli wants postgres:// and doesn't accept postgresql://.) The other approach would be writing a python-based CLI, but with the naive approach you lose a lot of tab-completion and similar features. Is there a portable way to do this?
MySql Explain with Tobias Petry
Programing Coderfunda
September 20, 2024
No comments
This week, we welcome Tobias Petry to the Laravel Creator Series show to discuss his journey into database optimization, the development of his MySQL Explain tool, and the acquisition of the domain mysqlexplain.com. Tobias also shares insights about his other projects, including Stack Bricks, a tool for managing different database versions, and his contributions to the Laravel Debug Bar.
➡️ Save 10% on his Indexing Beyond the Basics book and video package with the coupon code LARAVELNEWS
Show Links
*
https://x.com/tobias_petry
/>
*
https://tpetry.me
/>
*
https://mysqlexplain.com
/>
*
https://stackbricks.app
/>
*
https://sqlfordevs.com
/>
*
https://goodindexes.com
/>
The post MySql Explain with Tobias Petry appeared first on Laravel News.
Join the Laravel Newsletter to get Laravel articles like this directly in your inbox.
How to combine information from different devices into one common abstract virtual disk? [closed]
Programing Coderfunda
September 20, 2024
No comments
I need to create a program that can combine computers and their hard drives into one virtual disk. It should be a compiled executable (exe) application. Please give me at least some information about this.
19 September, 2024
AdminJS not overriding default dashboard with custom React component
Programing Coderfunda
September 19, 2024
No comments
It's being initialized but its not overriding the default dashboard.
AdminJS initialized with dashboard: { component: 'Dashboard' }
Code is provided below
Dashboard.jsx:
import React from 'react';
import { Box } from '@adminjs/design-system';
import { useTranslation } from 'adminjs';
const Dashboard = () => {
const { translateMessage } = useTranslation();
console.log('dashboard component loading...')
return (
{translateMessage('helloMessage', 'Hello')}
);
};
export default Dashboard;
admin.js:
import AdminJS from 'adminjs';
import { Database, Resource } from '@adminjs/sequelize';
import Customers from './src/models/Customers.js';
import Product from './src/models/Product.js';
import People from './src/models/People.js';
import Companies from './src/models/Companies.js';
import Leads from './src/models/Leads.js';
import Offers from './src/models/Offers.js';
import { ComponentLoader } from 'adminjs';
const componentLoader = new ComponentLoader();
const Components = {
Dashboard: componentLoader.add('Dashboard', './src/components/Dashboard.jsx')
};
AdminJS.registerAdapter({ Database, Resource });
const adminOptions = {
dashboard: {
component: Components.Dashboard
},
componentLoader,
resources: [{
resource: Customers,
options: {
parent: null,
properties: {
id: {
isVisible: { list: false, edit: false, show: false },
},
type: {
position: 1,
availableValues: [
{ value: 'company', label: 'Company' },
{ value: 'person', label: 'Person' },
],
},
name: {
position: 2,
},
email: {
position: 3,
},
phone: {
position: 4,
},
country: {
position: 5,
},
},
},
},
{
resource: People,
options: {
parent: null,
},
},
{
resource: Companies,
options: {
parent: null,
},
},
{
resource: Leads,
options: {
parent: null,
properties: {
type: {
availableValues: [
{ value: 'company', label: 'Company' },
{ value: 'person', label: 'Person' },
],
},
},
},
},
{
resource: Offers,
options: {
parent: null,
},
},
{
resource: Product,
options: {
parent: null,
},
},
],
rootPath: '/admin',
};
export default adminOptions;
server.js:
import AdminJS from 'adminjs'
import AdminJSExpress from '@adminjs/express'
import express from 'express'
import dotenv from 'dotenv'
import sequelize from './src/config/db.js';
import { Database, Resource } from '@adminjs/sequelize';
import adminOptions from './admin.js';
dotenv.config();
const PORT = 3000;
const start = async () => {
const app = express()
AdminJS.registerAdapter({ Database, Resource });
const admin = new AdminJS(adminOptions);
console.log('AdminJS initialized with dashboard:', admin.options.dashboard);
const adminRouter = AdminJSExpress.buildRouter(admin)
app.use(admin.options.rootPath, adminRouter)
app.listen(PORT, async () => {
console.log(`AdminJS started on
http://localhost:${PORT}${admin.options.rootPath}`)
/>
try {
await sequelize.authenticate();
console.log("database connected successfully")
await sequelize.sync();
console.log("database models synchronized")
}
catch (err) {
console.log("error connecting to database", err)
}
})
}
start()
I tried logging any information regarding it but it seems like it's not loading the component at all?
Any help or suggestions would be appreciated. Thanks!
